Battery and electrical device

Abstract

A battery (200) and an electrical device (100), which apply to the technical field of traction batteries. The battery comprises: a housing (300), which is configured to accommodate battery cells (30); at least two fixing beams (71), wherein the at least two fixing beams are spaced apart in the housing, a space for accommodating the battery cells being formed between every two adjacent fixing beams; fixing seats (72) arranged on the fixing beams; and limiting members (73) which are connected to the fixing seats on different fixing beams. Connecting the limiting members to different fixing beams enables deformation of the fixing beams to be suppressed by means of the limiting members, thus enhancing the strength of the fixing beams, and reducing a degree of deformation of the fixing beams along with the expansion of the battery cells. By means of the provision of the fixing seats, the strength at the joints between the limiting members and the fixing beams is enhanced to reduce failures such as breakage at the joints between the limiting members and the fixing beams; thus, the strength of the fixing beams is further enhanced, thereby better suppressing the expansion of the battery cells, improving the performance of the battery, and reducing potential safety hazards.

Description

Batteries and electrical devices

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 1, 2024, with application number 202420254586.3, and with the invention name "Battery and Electrical Device", the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of power batteries, and in particular to a battery and an electrical device. Background Art

[0003] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0004] During charging and discharging, batteries generate significant expansion forces, which act on the beam structure of the battery case and cause deformation. Failure to effectively suppress this deformation can lead to fractures in the beam structure, cracks in the cell casing, and breakage of the connecting aluminum bars, ultimately causing battery failure and even safety issues.

[0005] Summary of the Invention

[0006] In view of the above problems, the present application provides a battery and an electrical device that can alleviate the problem of box deformation.

[0007] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0008] A box body, which is used to accommodate battery cells;

[0009] At least two fixed beams, at least two fixed beams are spaced apart on the box body, and a space for accommodating battery cells is formed between two adjacent fixed beams;

[0010] A fixed seat, provided on the fixed beam;

[0011] The limiting member is connected to the fixing seats on different fixing beams.

[0012] In the technical solution of this embodiment, fixed beams are provided in the box body so that the battery cell can be placed between two adjacent fixed beams, and the expansion of the battery cell is suppressed by the fixed beams, thereby reducing the safety hazards caused by the expansion of the battery cell; the limiters are connected to different fixed beams to suppress the deformation of the fixed beams through the limiters, enhance the strength of the fixed beams, and reduce the deformation of the fixed beams with the expansion of the battery cell; the strength of the connection between the limiter and the fixed beam is enhanced by providing a fixing seat, and the occurrence of failures such as breakage at the connection between the limiter and the fixed beam is reduced, thereby further enhancing the strength of the fixed beam, thereby better suppressing the expansion of the battery cell, improving battery performance, and reducing safety hazards.

[0013] In some embodiments, a receiving groove can be formed between any two fixing beams, the battery cell is located in the receiving groove, and the fixing seat is provided on a side of the fixing beam facing away from the receiving groove.

[0014] Since the force exerted on the fixing seat mainly comes from the expansion of the battery cell, and the force generated by the expansion of the battery cell points from the accommodating slot to the outside of the accommodating slot, the technical solution of this embodiment arranges the fixing seat on the side of the fixed beam away from the accommodating slot, so that the force generated by the expansion of the battery cell can be partially applied to the fixing seat and transmitted to the limiter through the fixing seat, so as to reduce the situation where the force is concentrated at the connection between the fixing seat and the fixed beam, thereby reducing the situation where the connection between the fixing seat and the fixed beam fails, so that the force exerted on the fixed beam can be more easily transmitted to the fixing seat and the limiter, thereby further enhancing the strength of the fixed beam.

[0015] In some embodiments, a fixing groove is formed on the fixing beam, the fixing seat is accommodated in the fixing groove, and the outer wall of the fixing seat abuts against the inner wall of the fixing groove.

[0016] The technical solution of this embodiment further provides some ways of connecting the fixing seat and the fixed beam. A fixing groove is provided on the fixed beam, and the fixing seat is accommodated in the fixing groove, so that the interior of the fixing groove can be connected to the fixing seat from multiple directions, thereby increasing the contact area between the fixing seat and the fixed beam, so that the force can be transmitted to the fixing seat more evenly, reducing the situation where the force at the connection between the fixing seat and the fixed beam is concentrated on a certain point, thereby increasing the connection strength between the fixing seat and the fixed beam.

[0017] In some embodiments, along the height direction of the fixing beam, the size of the fixing groove is smaller than the size of the fixing beam.

[0018] In the technical solution of this embodiment, the dimension of the fixing groove in the direction of the height of the fixed beam is made smaller than the dimension of the fixed beam, so that the dimension of the fixing seat in the direction of the height of the fixed beam can also be smaller than the dimension of the fixed beam; when the fixed beam is subjected to the expansion force of the battery, the force applied to the fixing seat by the limiting member is directed from the outside to the direction of the accommodating groove, and the limiting member is connected to one end of the fixing seat, and the end of the fixing seat away from the limiting member is prone to form a lever force directed from the inside of the accommodating groove to the outside, and has a negative impact on the connection stability between the fixing seat and the fixed beam; making the dimension of the fixing seat in the direction of the height of the fixed beam smaller than the dimension of the fixed beam can reduce the negative impact of the lever force on the connection stability between the fixing seat and the fixed beam, thereby enhancing the connection strength between the fixing seat and the fixed beam.

[0019] In some embodiments, along the thickness direction of the fixing beam, the width of the fixing groove gradually increases, and the width of the fixing seat also gradually increases.

[0020] In the technical solution of this embodiment, the fixing groove is configured to have a shape that gradually expands in a direction away from the accommodating groove, and the width of the fixing seat is gradually increased so that the shape of the fixing seat can adapt to the shape of the fixing groove. This configuration can further increase the contact area between the fixing seat and the fixing beam, thereby further increasing the strength of the connection between the fixing seat and the fixing beam. At the same time, this configuration can also make the inner side wall of the fixing groove and the outer side wall of the fixing seat inclined relative to the direction of the expansion force. Since the fixing beam tends to deform in a direction away from the accommodating groove when subjected to the expansion force of the battery cell, this configuration can enable the expansion force applied to the connection between the fixing seat and the fixing beam to form a component force perpendicular to the inner side wall of the fixing groove as a tensile force, and also form a component force along the inner side wall of the fixing groove as a shear force, thereby reducing the situation where the connection between the fixing seat and the fixing groove is easily broken due to being subjected to only a single force. At the same time, the force applied to the connection between the fixing seat and the fixing groove can be dispersed and transmitted to the fixing beam, thereby further increasing the strength of the connection between the fixing seat and the fixing beam.

[0021] In some embodiments, the shape of the fixing seat is a triangular prism, a trapezoidal quadrangular prism or a semi-cylinder.

[0022] The technical solution of this embodiment further provides some specific structures of the fixing seat to increase the contact area between the fixing seat and the fixed beam, thereby further increasing the strength of the connection between the fixing seat and the fixed beam; at the same time, it can better disperse and transmit the force exerted on the connection between the fixing seat and the fixed beam to the inside of the fixed beam, thereby further increasing the strength of the connection between the fixing seat and the fixed beam.

[0023] In some embodiments, a weight-reducing groove is provided on the fixing seat.

[0024] In the technical solution of this embodiment, providing a weight-reducing groove on the fixing seat can reduce the weight of the fixing seat, thereby reducing the negative impact of the setting of the fixing seat on the overall weight of the box.

[0025] In some embodiments, at least two fixing seats are spaced apart on the fixing beam along the length direction of the fixing beam.

[0026] In the technical solution of this embodiment, a plurality of fixing seats are provided on the fixing beam, so that the fixing seats and the limiting members can better transmit the battery cell expansion force exerted on the fixing beam, thereby better achieving the effect of suppressing the deformation of the fixing beam.

[0027] In some embodiments, the material of the fixing base is the same as that of the fixing beam.

[0028] In the technical solution of this embodiment, the material of the fixing seat is the same as that of the fixing beam, so that the expansion force of the battery cell can be more evenly distributed between the fixing seat and the fixing beam, thereby reducing the occurrence of premature fracture and failure of the fixing seat or the fixing beam.

[0029] In some embodiments, the limiting member is detachably connected to the corresponding fixing seat.

[0030] In the technical solution of this embodiment, the limiting member is detachably connected to the fixing seat to facilitate the installation, disassembly and replacement of the limiting member; at the same time, it is also convenient to apply a pre-tightening force to the limiting member in advance, so that the limiting member can better suppress the deformation of the fixed beam through the pre-tightening force.

[0031] In some embodiments, the box further includes a first box; at least one fixed beam constitutes a frame of the first box, or each fixed beam is located inside the first box.

[0032] The technical solution of this embodiment provides some ways to set up the fixed beams, so that the fixed beams can be structural members inside the box, so that the fixed beams can also play a role in increasing the strength of the box; at the same time, the fixed beams can also serve as the frame of the box to reduce the space occupied by the fixed beams inside the box.

[0033] In some embodiments, the battery further comprises a battery cell, and the battery cell is disposed between two adjacent fixing beams;

[0034] The side surface of the battery cell includes two oppositely disposed first surfaces and two oppositely disposed second surfaces, wherein the first surface is adjacent to the second surface and the area of ​​the first surface is larger than the area of ​​the second surface; the first surface faces the fixed beam.

[0035] In the technical solution of this embodiment, the first surface with a larger area in the battery cell is opposite to the fixed beam. Since the deformation of the first surface with a larger area is usually greater, the expansion of the battery cell can be better suppressed by the fixed beam when the first surface is opposite to the fixed beam.

[0036] In some embodiments, the battery cell further includes a pressure relief mechanism, and the limiting member and the pressure relief mechanism are arranged alternately.

[0037] In the technical solution of this embodiment, the limiting members and the pressure relief mechanisms of the battery cells are arranged alternately to reduce the situation where the limiting members cover the pressure relief mechanisms and hinder the exhaust of the pressure relief mechanisms, thereby reducing the negative impact of the limiting members on the exhaust of the battery cells.

[0038] In a second aspect, some embodiments of the present application further provide an electrical device, comprising the battery provided by some embodiments of the first aspect.

[0039] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0041] FIG1 is a schematic structural diagram of an electrical device provided in some embodiments of the present application;

[0042] FIG2 is a schematic diagram of an exploded structure of a battery provided in some embodiments of the present application;

[0043] FIG3 is a schematic diagram of an exploded structure of a battery cell provided in some embodiments of the present application;

[0044] FIG4 is a perspective schematic diagram of a first box in some embodiments of the present application;

[0045] FIG5 is a partial enlarged schematic diagram of point A in FIG4 ;

[0046] FIG6 is a schematic diagram of the exploded structure of the fixed beam and the fixed seat in FIG5 ;

[0047] FIG7 is a schematic top view of a battery with the second housing removed provided by some embodiments of the present application;

[0048] FIG8 is a partial enlarged schematic diagram of point B in FIG7 .

[0049] The meanings of the marks in the figure are:

[0050] 100. Electrical devices;

[0051] 10. Motor;

[0052] 20. Controller;

[0053] 200, battery;

[0054] 30. Battery cell; 301. First surface; 302. Second surface; 31. End cap; 32. Electrode assembly; 33. Housing; 34. Pressure relief mechanism;

[0055] 300, box body;

[0056] 70. First box; 71. Fixed beam; 711. Fixed groove; 72. Fixed seat; 721. Threaded hole; 722. Weight-reducing groove; 73. Positioning member; 74. Accommodating groove;

[0057] 80. The second box. Modes for Carrying Out the Invention

[0058] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0060] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0061] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0062] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0063] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0064] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0065] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0066] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0067] Battery cells generate significant expansion forces during charge and discharge, which can act on the beam structure of the battery case and cause deformation. Failure to effectively suppress this deformation can lead to fractures in the beam structure, cracks in the battery cell casing, breakage of the current collector, and other problems, ultimately causing battery failure and even safety issues.

[0068] To alleviate the problem of battery cell expansion causing deformation of the battery case, a ring-shaped steel belt is typically installed inside the battery case. Specifically, the steel belt is wrapped around the multiple battery cells in the case, suppressing their expansion. While this arrangement can suppress the expansion of the battery cells, it requires wrapping the steel belt around the battery cells to form a battery module before the battery cells are installed in the case. This complicates the process of installing the battery cells into the case and negatively impacts production efficiency. Furthermore, if the ring-shaped steel belt is installed after the battery cells are installed, assembly becomes more difficult, and some battery cases lack the necessary space for the ring-shaped steel belt.

[0069] Some battery packs currently use steel straps secured directly to the box's beam structure using rivets, bolts, and other structures, limiting deformation of the beam structure. However, because the beam structure is often hollow, the strength of the connection between the steel strap and the beam is typically low, making rivets and bolts prone to dislodging. Increasing the beam's thickness or making it solid would significantly increase the box's weight and cost.

[0070] Based on the above considerations, in order to increase the strength of the box body and reduce the negative impact of the expansion of the battery cells on the box body, an embodiment of the present application provides a battery box body, in which the limiting member is connected to different fixed beams, and a fixed seat is provided at the connection between the limiting member and the fixed beam, that is, the fixed seat is provided on the fixed beam, and one end of the limiting member is provided on the fixed seat.

[0071] In such a box, since the battery cell is located between two adjacent fixed beams, the expansion of the battery cell will cause the fixed beam to deform away from the battery cell, that is, the deformation directions of the fixed beams on both sides of the battery cell are opposite, so that the limiter is connected to different fixed beams, so that the expansion forces at both ends of the limiter are in opposite directions, so as to utilize the expansion force of the battery cell itself and the structural strength of the limiter to limit the deformation of the fixed beam; at the same time, the limiter can connect the various fixed beams into an integral system. At this time, the force exerted on the fixed beam can be transmitted to the entire system, thereby reducing the occurrence of local deformation of the fixed beam, thereby achieving the effect of suppressing the deformation of the fixed beam and enhancing the strength of the fixed beam, thereby reducing the deformation of the box.

[0072] The limiting member and the fixed beam are connected through a fixing seat, which can reduce failures such as breakage at the connection between the limiting member and the fixed beam, further enhance the strength of the fixed beam, and thus better suppress the expansion of the battery cell, improve battery performance, and reduce safety hazards.

[0073] The box disclosed in the embodiments of the present application can be used to accommodate battery cells, and the battery cells can be applied to electrical devices that use power sources or various energy storage systems that use batteries as energy storage elements. The electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0074] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device 100 according to an embodiment of the present application.

[0075] Referring to Figure 1, Figure 1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 200 is provided inside the vehicle, and the battery 200 can be provided at the bottom, head or tail of the vehicle. The battery 200 can be used to power the vehicle. For example, the battery 200 can serve as an operating power source for the vehicle. The vehicle may also include a controller 20 and a motor 10. The controller 20 is used to control the battery 200 to power the motor 10, for example, for starting, navigating and operating power requirements during driving of the vehicle.

[0076] In some embodiments of the present application, the battery 200 can serve not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0077] Referring to Figure 2, Figure 2 is an exploded view of a battery 200 provided in some embodiments of the present application. The battery 200 includes a housing 300 and a battery cell 30, with the battery cell 30 housed within the housing 300. The housing 300 is used to provide a storage space for the battery cell 30, and the housing 300 can have various structures. In some embodiments, the housing 300 can include a first housing 70 and a second housing 80, which cover each other and together define a storage space for the battery cell 30. The second housing 80 can be a hollow structure with one end open. The first housing 70 can be a plate-like structure, with the first housing 70 covering the open side of the second housing 80, so that the first housing 70 and the second housing 80 jointly define a storage space. The first housing 70 and the second housing 80 can also be hollow structures with one end open, with the open side of the first housing 70 covering the open side of the second housing 80. Of course, the box body 300 formed by the first box body 70 and the second box body 80 can be in various shapes, such as a cylinder, a cuboid, etc.

[0078] In the battery 200, there may be multiple battery cells 30, and the multiple battery cells 30 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 30. The multiple battery cells 30 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery 200 structure is housed within the housing 300. Of course, the battery 200 may also be a battery 200 module formed by first connecting multiple battery cells 30 in series, in parallel, or in a hybrid connection, and then the multiple battery 200 modules are further connected in series, in parallel, or in a hybrid connection to form a complete battery 200 structure, and then housed within the housing 300. The battery 200 may also include other structures, for example, the battery 200 may also include a busbar component for electrically connecting the multiple battery cells 30.

[0079] Each battery cell 30 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 30 may be cylindrical, flat, rectangular, or in other shapes.

[0080] Referring to Figure 3, Figure 3 is a schematic diagram of the exploded structure of a battery cell 30 provided in some embodiments of the present application. A battery cell 30 is the smallest unit that makes up a battery 200. As shown, a battery cell 30 includes an end cap 31, a housing 33, an electrode assembly 32, and other functional components.

[0081] The end cap 31 is a component that covers the opening of the housing 33 to isolate the internal environment of the battery cell 30 from the external environment. The shape of the end cap 31 can be adapted to the shape of the housing 33 to fit the housing 33. Optionally, the end cap 31 can be made of a material with a certain degree of hardness and strength (such as an aluminum alloy). This prevents the end cap 31 from deforming when subjected to compression or collision, thereby providing the battery cell 30 with greater structural strength and improved safety. Functional components such as electrode terminals can be provided on the end cap 31. The electrode terminals can be used to electrically connect to the electrode assembly 32 for inputting or outputting electrical energy from the battery cell 30. In some embodiments, the end cap 31 can also be provided with a pressure relief mechanism 34 for relieving internal pressure when the internal pressure or temperature of the battery cell 30 reaches a threshold. The end cap 31 can also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this embodiment of the present application does not impose any particular limitations on this. In some embodiments, an insulating member may be provided inside the end cap 31 to isolate the electrical connection components in the housing 33 from the end cap 31 to reduce the risk of short circuit. For example, the insulating member may be made of plastic, rubber, or the like.

[0082] The housing 33 is a component that cooperates with the end cap 31 to form the internal environment of the battery cell 30. This internal environment can be used to accommodate the electrode assembly 32, electrolyte, and other components. The housing 33 and end cap 31 can be separate components. An opening can be provided in the housing 33, and the end cap 31 is placed over the opening to form the internal environment of the battery cell 30. Alternatively, the end cap 31 and housing 33 can be integrated. Specifically, the end cap 31 and housing 33 can form a common connection surface before other components are inserted into the housing. When the interior of the housing 33 is to be enclosed, the end cap 31 is placed over the housing 33. The housing 33 can have a variety of shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, or a hexagonal prism. Specifically, the shape of the housing 33 can be determined based on the specific shape and size of the electrode assembly 32. The housing 33 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this embodiment of the present application does not impose any particular limitations on this.

[0083] The electrode assembly 32 is a component in the battery cell 30 where electrochemical reactions occur. One or more electrode assemblies 32 may be contained in the housing 33. The electrode assembly 32 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 32, and the parts of the positive and negative electrode sheets without active materials each constitute a tab. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery 200, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0084] In the first aspect, some embodiments of the present application provide a battery 200, referring to Figures 2 and 4, wherein Figure 2 is a schematic diagram of the explosion structure of the battery 200 provided in some embodiments of the present application, and Figure 4 is a three-dimensional schematic diagram of the first box body 70 in the box body 300 provided in some embodiments of the present application.

[0085] In FIG. 4 , the direction of the X-axis is the length direction of the box body 300 , the direction of the Y-axis is the width direction of the box body 300 , and the direction of the Z-axis is the height direction of the box body 300 .

[0086] In some embodiments of the present application, the battery 200 includes a box body 300, which is used to accommodate the battery cell 30. The box body 300 includes a fixed beam 71, a fixed seat 72 and a limit member 73. Specifically, the box body 300 includes at least two fixed beams 71 spaced apart on the box body 300, and a space for accommodating the battery cell 30 is formed between two adjacent fixed beams 71; the fixed seat 72 is provided on the fixed beam 71; and the limit member 73 is connected to the fixed seat 72 on different fixed beams 71.

[0087] The fixed beam 71 refers to a structure formed inside the box body 300. The fixed beam 71 can be arranged on the first box body 70 or on the second box body 80. The main function of the fixed beam 71 is to provide strength for the box body 300. At the same time, the fixed beam 71 can also limit the position of the battery cell 30 to assist in fixing the battery cell 30. The shape of the fixed beam 71 can be a rectangular parallelepiped, a cylindrical shape or other shapes. The material of the fixed beam 71 can be metal, plastic or other materials. The fixed beam 71 can be welded to the box body 300, or it can be arranged on the box body 300 by other means such as snap connection, bolt connection, adhesive connection, etc.

[0088] Since the main function of the fixing beam 71 is to increase the strength of the box body 300, and the setting of the fixing beam 71 should not affect the arrangement of the battery cell 30 in the box body 300, there should be at least two fixing beams 71. At this time, the two fixing beams 71 can be arranged on opposite sides of the battery cell 30 to reduce the negative impact of the fixing beam 71 on the installation and arrangement of the battery cell 30. At the same time, the fixing beam 71 can also be abutted against the battery cell 30 to assist in fixing the battery cell 30; at least two fixing beams 71 can also better enhance the strength of the box body 300.

[0089] The fixing seat 72 refers to a structure in the box body 300 that provides a fixed basis for the limit member 73. At the same time, the fixing seat 72 is also used as a transition structure between the limit member 73 and the fixed beam 71. The shape of the fixing seat 72 can be a block, a sheet or other shapes. The fixing seat 72 can be a rectangular parallelepiped, a prism or other shapes. The material of the fixing seat 72 can be the same as the material of the fixed beam 71. The material of the fixing seat 72 can also be different from the material of the fixed beam 71. For example, the material of the fixing seat 72 can be metal, plastic or other materials. The fixing seat 72 can be welded to the fixed beam 71, or it can be arranged on the fixed beam 71 by means of snap connection, adhesive connection, bolt connection, etc.

[0090] The limiter 73 refers to a structure connecting different fixed beams 71 in the box body 300. The two ends of the limiter 73 are respectively connected to different fixed beams 71 to limit the deformation of the fixed beams 71 and enhance the strength of the fixed beams 71; the shape of the limiter 73 can be strip-shaped, sheet-shaped (such as a metal sheet structure), block-shaped (such as a flat beam structure) or other shapes; the material of the limiter 73 can be metal, plastic or other materials; the limiter 73 can be connected to the fixing seat 72 by bolt connection, and can also be connected to the fixing seat 72 by welding, snap connection or other methods.

[0091] Because the fixing seat 72 is connected to the fixing beam 71, the expansion force of the battery cell 30 on the fixing beam 71 can be transmitted to the limiter 73 through the fixing seat 72, and then transmitted to the other fixing beam 71 through the limiter 73, so as to suppress the force deformation or deformation tendency of the fixing beam 71, thereby improving the strength of the fixing beam 71.

[0092] Because the battery cell 30 is located between two adjacent fixed beams 71, the expansion of the battery cell 30 will cause the fixed beam 71 to deform in the direction away from the battery cell 30, that is, the deformation directions of the fixed beams 71 on both sides of the battery cell 30 are opposite, so that the limiter 73 is connected to different fixed beams 71, so that the expansion forces at both ends of the limiter 73 are in opposite directions, so as to utilize the expansion force of the battery cell 30 itself to limit the deformation of the fixed beam 71; at the same time, the limiter 73 can connect each fixed beam 71 into an integral system. At this time, the force exerted on the fixed beam 71 can be transmitted to the entire system, thereby reducing the occurrence of local deformation of the fixed beam 71, thereby achieving the effect of suppressing the deformation of the fixed beam 71 and enhancing the strength of the fixed beam 71, thereby reducing the deformation of the box body 300.

[0093] The limiting member 73 is connected to the fixed beam 71 via the fixing seat 72, thereby reducing the possibility of failure such as breakage at the connection between the limiting member 73 and the fixed beam 71, further enhancing the strength of the fixed beam 71, thereby better suppressing the expansion of the battery cell 30, improving the performance of the battery 200, and reducing safety hazards.

[0094] In this embodiment, a fixed beam 71 is provided in the box body 300, so that the battery cell 30 can be placed between two adjacent fixed beams 71, and the expansion of the battery cell 30 is suppressed by the fixed beam 71, thereby reducing the safety hazards caused by the expansion of the battery cell 30; the limiter 73 is connected to different fixed beams 71, so that the deformation of the fixed beam 71 can be suppressed by the limiter 73, the strength of the fixed beam 71 is enhanced, and the deformation of the fixed beam 71 with the expansion of the battery cell 30 is reduced; the strength of the connection between the limiter 73 and the fixed beam 71 is enhanced by providing a fixing seat 72, and the occurrence of failures such as breakage at the connection between the limiter 73 and the fixed beam 71 is reduced, thereby further enhancing the strength of the fixed beam 71, thereby better suppressing the expansion of the battery cell 30, improving the performance of the battery 200, and reducing safety hazards.

[0095] According to some embodiments of the present application, refer to Figures 4, 5, and 6, where Figure 4 is a three-dimensional schematic diagram of the first box body 70 in the box body 300 provided in some embodiments of the present application, Figure 5 is a partial enlarged schematic diagram of point A in Figure 4, and Figure 6 is an exploded structural schematic diagram of the fixed beam 71 and the fixed seat 72 in Figure 5.

[0096] In FIG. 4 , the direction of the X-axis is the length direction of the box body 300 , the direction of the Y-axis is the width direction of the box body 300 , and the direction of the Z-axis is the height direction of the box body 300 .

[0097] In some embodiments of the present application, a receiving groove 74 can be formed between any two fixing beams 71 , the battery cell 30 is located in the receiving groove 74 , and the fixing seat 72 is provided on a side of the fixing beam 71 away from the receiving groove 74 .

[0098] The accommodating groove 74 refers to a structure formed between two adjacent fixed beams 71. The accommodating groove 74 is used to provide space for the placement and arrangement of the battery cell 30. The accommodating groove 74 can be formed by the two fixed beams 71 in conjunction with the side walls and bottom walls of the box body 300. The accommodating groove 74 can also be formed by the two fixed beams 71 in conjunction with the bottom wall of the box body 300. The accommodating groove 74 can also be formed by only two fixed beams 71. The shape of the accommodating groove 74 can be rectangular, cylindrical or other shapes.

[0099] Since the number of the fixed beams 71 can be two, three or more, the receiving groove 74 can be formed between any two fixed beams 71. In some embodiments, there are two fixed beams 71, in which case the receiving groove 74 is formed between the two fixed beams 71, and the fixing seat 72 is provided on the side of the fixed beam 71 away from the receiving groove 74; in other embodiments, there are three fixed beams 71, and the receiving groove 74 is only formed between the two fixed beams 71 at both ends, that is, the fixed beam 71 in the middle of the three fixed beams 71 is only used to enhance the structural strength of the box body 300, and is not used to fix the fixing seat 72 and the limiter 73. In this case, the fixing seat 72 is provided on the side of the fixed beam 71 away from the receiving groove 74; in still other embodiments, the fixing seat 72 is provided on the side of the fixed beam 71 away from the receiving groove 74. There are three fixed beams 71, and the accommodating groove 74 is formed between two adjacent fixed beams 71. At this time, fixed seats 72 are provided on both sides of the fixed beam 71 in the middle among the three fixed beams 71, and the middle fixed beam 71 is mainly used to provide a fixed foundation for the fixed seat 72 so that it is not easily deformed by the expansion force. The limiting member 73 spans an accommodating groove 74 and is connected to the two fixed seats 72 on the side of the fixed beam 71 away from the corresponding accommodating groove 74; it can be understood that the number and arrangement of the fixed beams 71 and the setting method of the fixed seat 72 can also be other methods, and are not limited to the above-mentioned methods.

[0100] Because the limiter 73 is used to suppress the deformation of the fixed beam 71, and the fixing base 72 is used to provide a fixing base for the limiter 73, when the fixed beam 71 is subjected to the expansion force of the battery cell 30, the force is applied in the direction from the receiving groove 74 to the direction away from the receiving groove 74, that is, from the receiving groove 74 to the outside of the receiving groove 74 along the X-axis in the figure. The force applied to the fixing base 72 and the limiter 73 is the same as the force applied to the fixed beam 71. Accordingly, in this embodiment, the fixing base 72 is positioned on the side of the battery cell 30 away from the receiving groove 74. This allows the force generated by the expansion of the battery cell 30 to be partially applied to the fixing base 72 and transmitted to the limiter 73 through the fixing base 72. This reduces the concentration of force at the connection between the fixing base 72 and the fixed beam 71, thereby reducing the possibility of failure of the connection between the fixing base 72 and the fixed beam 71. This allows the force applied to the fixed beam 71 to be more easily transmitted to the fixing base 72 and the limiter 73, further enhancing the strength of the fixed beam 71.

[0101] According to some embodiments of the present application, refer to Figures 4, 5, and 6, where Figure 4 is a three-dimensional schematic diagram of the first box body 70 in the box body 300 provided in some embodiments of the present application, Figure 5 is a partial enlarged schematic diagram of point A in Figure 4, and Figure 6 is an exploded structural schematic diagram of the fixed beam 71 and the fixed seat 72 in Figure 5.

[0102] In FIG. 4 , the direction of the X-axis is the length direction of the box body 300 , the direction of the Y-axis is the width direction of the box body 300 , and the direction of the Z-axis is the height direction of the box body 300 .

[0103] In some embodiments of the present application, a fixing groove 711 is defined on the fixing beam 71 , the fixing seat 72 is received in the fixing groove 711 , and an outer wall of the fixing seat 72 abuts against an inner wall of the fixing groove 711 .

[0104] The fixing groove 711 refers to a groove structure opened on the fixing beam 71, and the fixing groove 711 is used to accommodate the fixing seat 72; the fixing groove 711 can be a rectangular groove, a trapezoidal groove or a groove of other shapes; the fixing groove 711 can be opened on any side of the fixing beam 71, for example, the fixing groove 711 is opened on the side of the fixing beam 71 away from the bottom surface of the box body 300, and for example, the fixing groove 711 is opened on the side of the fixing beam 71 away from the accommodating groove 74.

[0105] The fixing base 72 is accommodated within the fixing groove 711, and the outer wall of the fixing base 72 abuts the inner wall of the fixing groove 711. In other words, the sidewalls of the fixing groove 711 can connect to the fixing base 72 from multiple different directions. When the fixing beam 71 is subjected to the expansion force of the battery cell 30, the fixing beam 71 tends to deform away from the accommodating groove 74. At this time, the force applied to the fixing base 72 can be dispersed to different directions of the fixing beam 71 through the fixing base 72 and the inner wall of the fixing groove 711, thereby reducing force concentration, thereby reducing the force at the connection between the fixing base 72 and the fixing beam 71, and increasing the stability of the connection between the fixing base 72 and the fixing beam 71.

[0106] The outer wall of the fixing seat 72 abutting against the inner wall of the fixing groove 711 can also increase the contact area between the fixing seat 72 and the fixing beam 71, thereby increasing the connection strength between the fixing seat 72 and the side wall of the fixing groove 711, and can also make the force at the connection between the fixing seat 72 and the fixing beam 71 more dispersed, reducing the situation where the force is concentrated at a certain point where the fixing seat 72 and the fixed beam 71 are connected.

[0107] This embodiment further provides some ways of connecting the fixing seat 72 to the fixing beam 71. A fixing groove 711 is provided on the fixing beam 71, and the fixing seat 72 is accommodated in the fixing groove 711, so that the interior of the fixing groove 711 can be connected to the fixing seat 72 from multiple directions, thereby increasing the contact area between the fixing seat 72 and the fixed beam 71, so that the force can be transmitted to the fixing seat 72 more evenly, reducing the situation where the force at the connection between the fixing seat 72 and the fixed beam 71 is concentrated at a certain point, thereby increasing the connection strength between the fixing seat 72 and the fixed beam 71.

[0108] 4 , in some embodiments, along the height direction of the fixing beam 71 , the size of the fixing slot 711 is smaller than the size of the fixing beam 71 .

[0109] The height direction of the fixed beam 71 is the direction of the Z axis in the figure, and the size of the fixed beam 71 in its height direction refers to the size of the fixed beam 71 in the Z axis direction; the size of the fixing groove 711 in the height direction of the fixed beam 71 refers to the size of the fixing groove 711 in the Z axis direction; the size of the fixing seat 72 in the height direction of the fixed beam 71 refers to the size of the fixing seat 72 in the Z axis direction.

[0110] The dimension of the fixing groove 711 in the height direction of the fixing beam 71 is smaller than that of the fixing beam 71 , so that the dimension of the fixing seat 72 in the height direction of the fixing beam 71 is also smaller than that of the fixing beam 71 , that is, the length of the fixing seat 72 should not be too long.

[0111] If locking sill 75 , has locking sill 75 in place, and lock sill 75 is positioned between locking sill 75 and locking sill 75 in the direction of being closely knit, and lock sill 75 is positioned between the top and bottom of locking sill 75 .

[0112] At the same time, it can be understood that the dimension of the fixing seat 72 in the height direction of the fixing beam 71 should not be too short, so that the fixing seat 72 and the fixing beam 71 can be fully in contact with each other, so that the fixing seat 72 and the fixing beam 71 have a strong connection strength.

[0113] In this embodiment, the dimension of the fixing groove 711 in the height direction of the fixing beam 71 is smaller than the dimension of the fixing beam 71, so that the dimension of the fixing seat 72 in the height direction of the fixing beam 71 can also be smaller than the dimension of the fixing beam 71, so as to reduce the negative influence of the lever force generated by the limiting member 73 on the fixing seat 72 on the connection stability between the fixing seat 72 and the fixed beam 71, thereby enhancing the connection strength between the fixing seat 72 and the fixed beam 71.

[0114] 4 , 5 , and 6 , in some embodiments, along the thickness direction of the fixing beam 71 , the width of the fixing groove 711 gradually increases, and the width of the fixing seat 72 also gradually increases.

[0115] In Figure 4, the thickness direction of the fixed beam 71 is the direction of the X-axis, which is also the direction of the expansion force of the battery cell 30. The width direction of the fixing groove 711 is the direction of the Y-axis, and the width of the fixing groove 711 is the size of the fixing groove 711 in the Y-axis direction. The width of the fixing base 72 is the size of the fixing base 72 in the Y-axis direction.

[0116] Since the width of the fixing groove 711 gradually increases, the fixing groove 711 can be a triangular groove, a trapezoidal groove or a gradually expanding groove of other shapes; and since the width of the fixing seat 72 gradually increases, the shape of the fixing seat 72 can be a triangular prism, a trapezoidal quadrangular prism or other shapes.

[0117] The width of the fixing groove 711 gradually increases. Accordingly, the inner side wall of the fixing groove 711 can be a continuous surface inclined relative to the X-axis direction, and the inner side wall of the fixing groove 711 can also be a step-like structure or other structures; and similar to the fixing groove 711, the outer side wall of the fixing seat 72 can be a continuous surface inclined relative to the X-axis direction, or a step-like structure or other structures.

[0118] Compared with making the inner wall of the fixing groove 711 parallel to the X-axis, this setting can increase the contact area between the fixing seat 72 and the inner wall of the fixing groove 711, so that the fixing seat 72 can be more fully in contact with the fixing beam 71, so that the connection strength between the fixing seat 72 and the fixing beam 71 is stronger; at the same time, this setting can also disperse the force received at the connection between the fixing seat 72 and the inner wall of the fixing groove 711 to other positions of the fixed beam 71, thereby reducing the force received at the connection between the fixing seat 72 and the inner wall of the fixing groove 711, and also reducing the concentration of force, so as to achieve the effect of enhancing the connection strength between the fixing seat 72 and the inner wall of the fixing groove 711.

[0119] In this embodiment, the fixing groove 711 is configured to gradually expand in a direction away from the fixing groove 711, and the width of the fixing seat 72 is gradually increased so that the shape of the fixing seat 72 can adapt to the shape of the fixing groove 711. This configuration can further increase the contact area between the fixing seat 72 and the fixing beam 71, thereby further increasing the strength of the connection between the fixing seat 72 and the fixing beam 71. At the same time, this configuration can also cause the inner side wall of the fixing groove 711 and the outer side wall of the fixing seat 72 to be inclined relative to the direction of the expansion force. Because the fixing beam 71 tends to deform away from the accommodating groove 74 when subjected to the expansion force of the battery cell 30, this configuration can enable the expansion force applied to the connection between the fixing seat 72 and the fixing beam 71 to form a component force perpendicular to the inner side wall of the fixing groove 711 as a tensile force, and also form a component force along the inner side wall of the fixing groove 711 as a shear force, thereby reducing the possibility of the connection between the fixing seat 72 and the fixing groove 711 being easily broken due to only a single force, thereby further increasing the strength of the connection between the fixing seat 72 and the fixing beam 71.

[0120] 5 and 6 , in some embodiments, the fixing seat 72 is in the shape of a triangular prism, a trapezoidal quadrangular prism, or a semi-cylinder.

[0121] When the fixing seat 72 is a triangular prism, the bottom surface of the triangular prism faces the bottom wall of the box body 300 , and the tip of the triangular prism faces the receiving groove 74 .

[0122] When the fixing seat 72 is a trapezoidal quadrangular prism, the bottom surface of the trapezoidal quadrangular prism faces the bottom wall of the box body 300 , and the plane with a smaller area of ​​the trapezoidal quadrangular prism faces the receiving groove 74 .

[0123] When the fixing seat 72 is a semi-cylinder, the bottom surface of the semi-cylinder faces the bottom wall of the box body 300 , and the arc surface of the semi-cylinder faces the receiving groove 74 .

[0124] The fixing seat 72 is set to be in the shape of a triangular prism, a trapezoidal quadrangular prism or a semi-cylinder, so that the fixing seat 72 can disperse part of the force it is subjected to into the fixing beam 71, so as to reduce the force on the connection between the fixing seat 72 and the fixing beam 71, thereby increasing the strength of the connection between the fixing seat 72 and the fixing beam 71; at the same time, as the upper edge of the side wall connecting the fixing seat 72 and the fixing beam 71 is reduced, the stress concentration phenomenon at the connection between the fixing seat 72 and the fixing beam 71 can also be reduced, thereby further increasing the strength of the connection between the fixing seat 72 and the fixing beam 71.

[0125] This embodiment further provides some specific structures of the fixing seat 72 to increase the contact area between the fixing seat 72 and the fixed beam 71, thereby further increasing the strength of the connection between the fixing seat 72 and the fixed beam 71; at the same time, it can better disperse and transmit the force exerted on the connection between the fixing seat 72 and the fixed beam 71 to the inside of the fixed beam 71, thereby further increasing the strength of the connection between the fixing seat 72 and the fixed beam 71.

[0126] 5 and 6 , in some embodiments, a weight-reducing groove 722 is provided on the fixing seat 72 .

[0127] The purpose of the weight-reducing groove 722 is to reduce the weight of the fixing seat 72. Accordingly, the weight-reducing groove 722 can be provided on the top or bottom surface of the fixing seat 72, and should not be provided on the surface where the fixing seat 72 is connected to the fixing beam 71, so as to reduce the negative impact that the weight-reducing groove 722 may have on the connection strength between the fixing seat 72 and the fixing beam 71. The weight-reducing groove 722 can pass through the fixing seat 72 or extend into the interior of the fixing seat 72. The weight-reducing groove 722 can be a square groove, a circular groove, or a groove of other shapes. The number of weight-reducing grooves 722 can be one, two, or more.

[0128] In this embodiment, the weight-reducing groove 722 is provided on the fixing seat 72 to reduce the weight of the fixing seat 72 , thereby reducing the negative impact of the setting of the fixing seat 72 on the overall weight of the box body 300 .

[0129] According to some embodiments of the present application, referring to FIG. 4 , FIG. 4 is a schematic three-dimensional view of the first box body 70 in the box body 300 provided in some embodiments of the present application.

[0130] In some embodiments of the present application, at least two fixing seats 72 are spaced apart on the fixed beam 71 along the length direction of the fixed beam 71. Specifically, the number of the fixing seats 72 can be two, three, four or more, and accordingly, the number of the limiting members 73 also increases accordingly.

[0131] Due to limitations such as material strength and the connection strength between the fixing seat 72 and the fixing beam 71 , each fixing seat 72 and the limiting member 73 structure can only suppress the expansion force of the battery cell 30 to a limited extent. Therefore, multiple fixing seats 72 are provided to better enhance the force-bearing capacity of the fixing seat 72 and the limiting member 73 structure, thereby better suppressing the deformation of the fixing beam 71 .

[0132] In this embodiment, a plurality of fixing seats 72 are provided on the fixing beam 71 so that the fixing seats 72 and the limiting members 73 can better transmit the expansion force of the battery cells 30 exerted on the fixing beam 71 , thereby better suppressing the deformation of the fixing beam 71 .

[0133] According to some embodiments of the present application, the material of the fixing seat 72 is the same as the material of the fixing beam 71; for example, the material of the fixing seat 72 and the fixing beam 71 can both be aluminum or aluminum alloy; for another example, the material of the fixing seat 72 and the fixing beam 71 can also be steel; it can be understood that the material of the fixing seat 72 and the fixing beam 71 can also be other materials, and is not limited to aluminum, aluminum alloy, steel and other materials.

[0134] This arrangement can facilitate welding of the fixing seat 72 and the fixing beam 71 , and can also facilitate force transmission between the fixing seat 72 and the fixing beam 71 .

[0135] Because the fixing seat 72 and the fixing beam 71 are made of the same material, the fixing seat 72 and the fixing beam 71 can also have the same or similar deformation trends. If the deformation trends of the fixing seat 72 and the fixing beam 71 are different, it may cause the fixing seat 72 and the fixing beam 71 to have a tendency to relative displacement and form internal force, which in turn makes it easy for the connection between the fixing seat 72 and the fixing beam 71 to bear additional force in addition to the expansion force of the battery cell 30. Therefore, making the fixing seat 72 and the fixing beam 71 of the same material can also reduce the occurrence of additional force on the connection between the fixing seat 72 and the fixing beam 71 due to different deformation trends, thereby strengthening the connection strength between the fixing seat 72 and the fixing beam 71.

[0136] If the fixing base 72 and the fixing beam 71 are made of different materials, one of the fixing base 72 and the fixing beam 71 may break or fail first, while the other has not yet reached its structural limit, which may lead to insufficient utilization of the structure. Therefore, making the fixing base 72 and the fixing beam 71 of the same material can also ensure full utilization of the structure and reduce the possibility of one of the fixing base 72 and the fixing beam 71 failing first.

[0137] In this embodiment, the material of the fixing seat 72 is the same as that of the fixing beam 71 so that the expansion force of the battery cell 30 can be more evenly distributed between the fixing seat 72 and the fixing beam 71, thereby reducing the occurrence of the fixing seat 72 or the fixing beam 71 breaking and failing first.

[0138] According to some embodiments of the present application, refer to Figures 5 to 8, wherein Figure 5 is a partially enlarged schematic diagram of point A in Figure 4, Figure 6 is a schematic diagram of the exploded structure of the fixed beam 71 and the fixed seat 72 in Figure 5, Figure 7 is a top view schematic diagram of the battery 200 provided in some embodiments of the present application after removing the second box body 80, and Figure 8 is a partially enlarged schematic diagram of point B in Figure 7.

[0139] In some embodiments of the present application, the limiting member 73 is detachably connected to the corresponding fixing seat 72, and the detachable connection method can be a bolt connection, a snap connection or other detachable connection methods.

[0140] The position-limiting member 73 is detachably connected to the fixing seat 72 , which facilitates installation, removal and replacement of the position-limiting member 73 .

[0141] The limit member 73 is detachably connected to the fixing seat 72, which can also make it easier for the staff to apply a pre-tightening force to the limit frame before the limit member 73 is installed. For example, the staff can first apply a pulling force to both ends of the limit member 73, and then install the two ends of the limit member 73 on the corresponding two fixing seats 72. At this time, after the limit member 73 is installed, the restoring force of the limit member 73 can apply a force from the outside toward the inside of the accommodating groove 74 to the fixing seat 72, thereby better suppressing the deformation of the fixed beam 71.

[0142] In this embodiment, the limiting member 73 is detachably connected to the fixing seat 72 to facilitate the installation, removal and replacement of the limiting member 73; at the same time, it is also convenient to apply a pre-tightening force on the limiting member 73 in advance, so that the limiting member 73 can better suppress the deformation of the fixed beam 71 through the pre-tightening force.

[0143] According to some embodiments of the present application, refer to Figures 2 and 4, where Figure 2 is a schematic diagram of the exploded structure of the battery 200 provided in some embodiments of the present application, and Figure 4 is a stereoscopic schematic diagram of the first box body 70 in the box body 300 provided in some embodiments of the present application.

[0144] In some embodiments of the present application, the box 300 further includes a first box 70 ; at least one fixed beam 71 constitutes a frame of the first box 70 , or each fixed beam 71 is located inside the first box 70 .

[0145] The first box body 70 refers to a part of the box body 300. The first box body 70 can independently define the storage space for accommodating the battery cell 30, and the first box body 70 can also cooperate with other structures to define the storage space for accommodating the battery cell 30. In addition to providing an installation base for the battery cell 30, the first box body 70 can also provide a fixing base for the fixed beam 71, the limit member 73 or other structures.

[0146] The first box body 70 may be made of metal, plastic or other materials; the first box body 70 may be in a rectangular parallelepiped, cylindrical or other shapes.

[0147] The fixed beam 71 can serve as a component inside the first box body 70 to enhance the strength of the first box body 70 and provide a fixed foundation for the fixing seat 72; the fixed beam 71 can also serve as the frame of the first box body 70 to reduce the occupation of the internal space of the first box body 70 by the fixed beam 71.

[0148] This embodiment provides some ways of setting up the fixed beam 71, so that the fixed beam 71 can be a structural member inside the box body 300, so that the fixed beam 71 can also play a role in increasing the strength of the box body 300; at the same time, the fixed beam 71 can also serve as the frame of the box body 300, so as to reduce the space occupied by the fixed beam 71 inside the box body 300.

[0149] 5 and 6 , in some embodiments, the stopper 73 is fixed to the fixing base 72 by bolts. Specifically, the fixing base 72 has a threaded hole 721, and the stopper 73 has a through hole. When the stopper 73 is installed, the through hole of the stopper 73 is aligned with the threaded hole 721 of the fixing base 72. Then, a bolt is passed through the through hole and threadedly engaged with the threaded hole 721.

[0150] According to some embodiments of the present application, three fixed beams 71 are evenly spaced in the first box body 70 , two fixed seats 72 are spaced apart on each fixed beam 71 , and both ends of the limiting member 73 are respectively connected to the fixed seats 72 of two adjacent fixed beams 71 .

[0151] In other embodiments, three fixed beams 71 are evenly spaced in the first box body 70, and no fixed seat 72 is provided on the middle fixed beam 71, while three fixed seats 72 are provided on the fixed beams 71 at both ends, and both ends of the limiting member 73 are respectively connected to the fixed seats 72 of the fixed beams 71 at both ends.

[0152] In some other embodiments, two fixed beams 71 are spaced apart in the first box body 70 , four fixed seats 72 are spaced apart on each fixed beam 71 , and both ends of the limiting member 73 are respectively connected to the fixed seats 72 on the two fixed beams 71 .

[0153] 2 and 3 , in some embodiments, the battery 200 further includes a battery cell 30 , which is disposed between two fixed beams 71 ; the battery cell 30 includes two oppositely disposed first surfaces 301 and two oppositely disposed second surfaces 302 , wherein the first surface 301 is adjacent to the second surface 302 , and the area of ​​the first surface 301 is greater than the area of ​​the second surface 302 ; the first surface 301 faces the fixed beam 71 .

[0154] The first surface 301 and the second surface 302 of the battery cell 30 both refer to outer surfaces of the housing 33 thereof, wherein the first surface 301 is adjacent to the second surface 302 , and the area of ​​the first surface 301 is larger than that of the second surface 302 .

[0155] When the battery cell 30 is assembled in the first box 70, the first surface 301 of the battery cell 30 is oriented toward the fixed beam 71, that is, the larger surface of the battery cell 30 is oriented toward the fixed beam 71. When the battery cell 30 expands, the first surface 301 is deformed more significantly. When the first surface 301 is opposite the fixed beam 71, the deformation of the battery cell 30 can be better suppressed by the fixed beam 71, thereby reducing the possibility of cracking of the shell 33 and breaking of the connecting aluminum bar due to excessive expansion of the battery cell 30.

[0156] In this embodiment, the first surface 301 with a larger area of ​​the battery cell 30 is opposite to the fixing beam 71. Since the deformation of the first surface 301 with a larger area is usually greater, the expansion of the battery cell 30 can be better suppressed by the fixing beam 71 when the first surface 301 is opposite to the fixing beam 71.

[0157] 3 , in some embodiments, the battery cell 30 further includes a pressure relief mechanism 34 , and the limiting member 73 and the pressure relief mechanism 34 are arranged alternately.

[0158] The pressure relief mechanism 34 can be provided on the end cap 31 and is used to relieve internal pressure when the internal pressure or temperature of the battery cell 30 reaches a threshold. The pressure relief mechanism 34 can be an explosion-proof valve, or a pressure relief valve, explosion-proof cap, fusible plug, or other device with a pressure relief function. In some embodiments, the pressure relief mechanism 34 is an explosion-proof valve that opens and discharges gas from the housing 33 to the outside when the air pressure inside the housing 33 exceeds a pressure relief threshold. The pressure relief threshold can be set based on the number, density, and layout of the electrode assemblies 32 in the battery cell 30, and the volume and material of the housing 33. In some embodiments, the pressure relief mechanism 34 can also be provided on any end surface of the housing 33, not just on the end cap 31.

[0159] According to the function of the pressure relief mechanism 34, in this embodiment, the limiting member 73 and the pressure relief mechanism 34 of the battery cell 30 are staggered to reduce the situation where the limiting member 73 covers the pressure relief mechanism 34 and hinders the exhaust of the pressure relief mechanism 34, thereby reducing the negative impact of the limiting member 73 on the exhaust of the battery cell 30.

[0160] In a second aspect, some embodiments of the present application further provide an electrical device 100 , comprising the battery 200 provided in some embodiments of the first aspect.

[0161] The electric device 100 may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0162] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A battery, characterized in that: include: A box body, the box body is used to accommodate battery cells; At least two fixing beams, wherein at least two of the fixing beams are spaced apart and arranged on the box body, and a space for accommodating the battery cells is formed between two adjacent fixing beams; A fixing seat, provided on the fixing beam; A limiting member is connected to the fixing seats on different fixing beams.

2. The battery according to claim 1, characterized in that An accommodating groove can be formed between any two of the fixing beams. The battery cell is located in the accommodating groove. The fixing seat is provided on a side of the fixing beam facing away from the accommodating groove.

3. The battery according to claim 1, characterized in that A fixing groove is formed on the fixing beam, the fixing seat is accommodated in the fixing groove, and the fixing seat abuts against the inner wall of the fixing groove.

4. The battery according to claim 3, characterized in that Along the height direction of the fixing beam, the size of the fixing groove is smaller than the size of the fixing beam.

5. The battery according to claim 3, characterized in that Along the thickness direction of the fixing beam, the width of the fixing groove gradually increases, and the width of the fixing seat also gradually increases.

6. The battery according to claim 5, characterized in that The shape of the fixing seat is a triangular prism, a trapezoidal quadrangular prism or a semi-cylinder.

7. The battery according to any one of claims 1 to 6, characterized in that A weight-reducing groove is provided on the fixing seat.

8. The battery according to any one of claims 1 to 7, characterized in that At least two fixing seats are spaced apart on the fixing beam along the length direction of the fixing beam.

9. The battery according to any one of claims 1 to 8, characterized in that The material of the fixing seat is the same as that of the fixing beam.

10. The battery according to any one of claims 1 to 9, characterized in that The limiting member is detachably connected to the corresponding fixing seat.

11. The battery according to any one of claims 1 to 10, characterized in that The box body also includes a first box body; At least one of the fixing beams forms a frame of the first box, or each of the fixing beams is located inside the first box.

12. The battery according to any one of claims 1 to 11, characterized in that: The battery further comprises a battery cell, wherein the battery cell is arranged between two adjacent fixing beams; The side surface of the battery cell includes two oppositely disposed first surfaces and two oppositely disposed second surfaces, the first surface is adjacent to the second surface, and the area of the first surface is larger than the area of the second surface; The first surface faces the fixed beam.

13. The battery according to any one of claims 1 to 12, characterized in that The battery cell further includes a pressure relief mechanism, and the limiting member and the pressure relief mechanism are arranged alternately.

14. An electrical device, characterized in that: Comprising the battery according to any one of claims 1 to 13.

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